Vent Cap Kits & Combos for Duct Leakage Testing

Vent Cap Systems™ offers complete Vent Cap Kits designed for professional duct leakage testing. Whether you’re just starting out or expanding your equipment lineup, our all-in-one combos deliver everything you need—reusable vent seals, ladder-free installation, and big savings over buying items individually.

Why Choose a Vent Cap Kit?

  • Ready to Work: Each kit includes everything needed to seal HVAC supply vents quickly and accurately.
  • Reusable & Durable: Built to survive hundreds of tests—no waste, no tape.
  • Save Money: Kit pricing beats individual component costs.
  • Field-Proven: Trusted by energy auditors, HVAC contractors, and home-performance specialists nationwide.

Our Most Popular Kits

MiniPack™

Includes: 9 Vent Caps, 1 Vent Cap with ¼" barbed adapter, and a Pole RAT™ for ladder-free setup.
Perfect for single-system homes or starter kits. Lightweight, portable, and ready for any test.

Price: $425

Total Home Pack™

Includes: Everything in the MiniPack plus 10 additional Vent Caps (total of 20). Ideal for full-house duct testing or multi-system setups. Comes with a Pole RAT™ and all seals pre-strung for immediate use.

Price: $775

Custom Pro Kits

Need a configuration tailored to your workflow? Combine Vent Caps, Duct Ninja™ return-air seal, and extra Pole RATs™ for the perfect balance of quantity and reach.

Kit Components

  • Vent Caps – Reusable supply-vent seals with foam gaskets.
  • Pole RAT™ – Attach and remove Vent Caps from the ground.
  • Duct Ninja™ – Seals return grills under negative pressure.

Which Kit Is Right for You?

Kit Typical Use Vent Caps Included Includes Pole RAT™
MiniPack™ Single-system homes, auditors starting out 10 (9 + 1 adapter) ✔
Total Home Pack™ Larger homes or multi-system tests 20 (19 + 1 adapter) ✔
Custom Pro Kit High-volume testing teams As requested Optional

Frequently Asked Questions

Can I buy components separately?

Yes—individual Vent Caps, Pole RATs™, and accessories are available for reorder anytime.

How long do Vent Caps last?

Many testers reuse the same set for years—hundreds of tests—with no degradation. Each cap is made from durable polymer and a resilient foam gasket.

What size vents do the kits fit?

Standard Vent Caps fit registers up to approximately 10" × 16"; Large models handle up to 16.5" square. 

Do the kits include returns?

Supply vents only. Pair your kit with a Duct Ninja™ for return-air sealing under negative pressure.

Can I get a bulk discount?

Yes—volume pricing is available for training centers, utilities, and large contractors. Contact us for quotes.

Free shipping on orders over $500. Seal faster, work cleaner, and start Making Green Faster™ with Vent Cap Systems™.